Finding the Fourth Proportional to 2,661.91, 3,993.33 and 906.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,661.91 : 3,993.33 = 906.82 : x
2. Step 2: Convert to fraction form
   2,661.91/3,993.33 = 906.82/x
3. Step 3: Cross multiply
   2,661.91x = 3,993.33 × 906.82
4. Step 4: Simplify right side
   2,661.91x = 3,621,231.51
5. Step 5: Solve for x
   x = 3,621,231.51/2,661.91
6. Step 6: Final answer
   x = 1,360.39